i have a lot of experience on gpu transcode and transcoding system.
but from your project description, i have some questions:
1. do you need an transcode software, which software can config 50 stream transcode at same time ?
2. which OS do you want? is Linux ubuntu OK?
3. the Mpeg bitrate and resolution?
4. the output H264/H265 bitrate and resolution?
looking forward your reply. after knowing the detail information of your project, we can negotiate an more suitable fee and time.